Valve for blowing-engines.



L. IVERSEN. VALVE FOB BLOWING ENGINES.

1221.101110] mum no. so, 1910.

1,012,359. Patented 1m 19, 1911.

2 snags-sum- 1. l6

WITNESSES L. IVBRSEN.

VALVE FOB BLOWING ENGINES.

APPLICATION rum: 1:20.30, 1910.

2 SHEETS-SHEET 2.

eeeeeeeeee van-messes LORENZ IVERSEN, OF WEST HOMESTEAD, PENNSYLVANIA.

VALVE FOB BIDWING-ENGINES.

Specification of Letters Patent.

Patented Dec. 19, 1911.

Application filed December 30, 1910. Serial No. 600,140.

To. all whom it may concern:

Be it known that I, LORENZ Ivnnsrm, a resident of West Homestead, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Valves for Blowing-Engines, &c., of which the following is a specification.

The primary object of this invention is to rovide a sensitive and highly efficient spring-supported valve for blowing engines, compressors, etc., in which friction is avoided, and in which the valve-supporting spring element is serviceable for an indefinite period without wear or danger of breaking down.

A further object is to provide improved means for cushioning the valve at it aproaches the opening and closing limits of its movement.

Still another object is to simplify thereby minimize the cost as well as of derangement.

A further purpose is to provide a con struction that may be used interchangeably for inlet and outlet purposes by simply reversing its position in the head or other cylinder wall.

The invention consists in the novel features of construction, and combination of parts, hereinafter fully described and claimed and illustrated by the accompanying drawings, wherein- Figure 1 is a vertical cross-section of the improved valve mechanism mounted for outlet duty. Fig. 2 is an inverted plan of the ported valve seat. Fig. 3 is a top plan of the plate valve. Fig. 4 is a sectional plan, inverted, on line 4-4= of Fig. 1. Fi 5 is a vertical section similar toFig. 1, wit the valve mechanism in inverted position for duty as an inlet valve, and Fig. 6 is a top plan of the same. Fig. 7 is a vertical section of an arrangement of my improved valve mechanism without some of the attachments shown in Figs. 1 and 5, and Fig. 8 illustrates the construction of Fig. 7 partly in top plan and partly in sectional plan. Fig. 9 is a detail of the valve-supporting spring.

Referrin to the drawings, 2 is a portion of the hea or other wall-part of the cylinder of a blowing en ine, compressor, etc., which is formed wit a series of annular openings each shouldered circumferentially at 3 to form an abutment for the similarly shouldered valve seat or body 4. In the an d anger adaptations of Figs. 1, '2 and 5, the body is formed with two annular series of ports 5 and 6, one within the other, with the separating rib 7 and the outer rim portion 8 connected to the central body portion by the radial ribs or webs 9. The top surface of the body adjacent ports 5 and 6 is faced to receive the plate valve 10. The valve is cut out at 11 where it covers annular rib 7 to increase the air passage area when the valve is open. The center of the plate valve 1s cut away to form circular opening 12, with the edge of the metal curled or bent to form the annular hook-like flange 13.

B ody 4is formed with central hub-like 151018Ctl0n 4" which provides a seat for the central depressed portion 14 of the annular sto and spring holder 15, securedthereto by olt 30, the holder being thus spaced away from the valve seat, with the valve located and operating in such space. Holder 15 is flanged peripherally at 15 to form a stop for limiting the opening movement of the valve. Inwardly from flange 1 5' the holder is slotted annularlv at 16, with the edges of the slots turned th form hook-like flanges 17. The diameter of the circle of flanges 17 is somewhat larger than that of flange 13 of the valve. Interposed between the valve and part 15 is the tapered spiral spring 18, having its larger end-convolution 19 confined in hooks 17, while the opposite and smaller end convolution 20 is confined in flange .13 of the valve. The spring is preferably so shaped that its end convolutions are parallel, as shown in Fig. 9, and lie in these flanges, the coil being ofiset abruptly at 21 where it merges into the intermediate convolutions. With the valve thus mounted its entire weight is carried by spring 18 and it is also guided by the spring, there being no fixed guides for the development of friction and on which the valve may stick. If desired, a leaf-sprin 22 may be positioned to cushion the valve efore it strikes stop 15'.

Body 4 and spring holder 15 may be connected by posts 23 which confine cushioning springs 24 and 25 at opposite sides of the valve for further relievin it from shock in its reverse movements. Tt will be understood, however, that the posts and their springs may be omitted, for instance as shown in Fig 7 and 8, without in any wa detracting rom or modifyin the princip e of operation underlying t e spring- Ill carried and spring-guided valve. The openings through the valve for the posts are preferabl larger than the latter so that they ne not necessarily perform any valve-guiding function, though if desired they may be so utilized in valves of large size.

Liner plates 26 may be applied to the seating face of the plate valve, the edges of such liners being flanged to embrace the ed es of the main valve, as shown.

Vith the valve-carrying spring 18 tapered, its convolutions nest one wlthin the other as the valve opens so that it stiflens and the spring-pressure increases as the valve opens, due to the successive convolutions, beginning with theJargest, en aging plate 15 and becoming inactive. e result is that the valve when seated has the benefit of all the convolutions and is quite sensitive and opens quickly, and as the spring is stifl'est when the valve is fully open or nearly so it'closes promptly when free to do so, the closing movement be in ning before all ofthe air has passed. en it is remembered t at these valves operate fully in a fraction f a second of time, the utiht of the arm gement will be appreciate the pressure which resists opening rising rapidly withthe opening movement and falling as rapidly as the valve closes.

Furthermore, the tapered spring is much more compact and requires less room than a cylindrica coil, and with its end convolutrons parallelthe ressure is the same on all portions of t e va ve so that there is no tipping or twi ing tendency.

A distinctive feature'of the invention is the facility with which the valve mechanism may be used interchan and outlet urposes, as is c earl shown in Figs. 1 and 5. In both uses, the cylinder head or other wall art rovides the necessary abutment for t e va ve seat, in the case of the outlet valve, Fig. 1, the shoulder on the peri hery thereof seating against shoulder 3, wliile when the valve is reversed, as in Fi 5, rim 8 bears on said 'shoulder. In Giflfi'l instancefthe entire valve mechanism does not project beyond the lower or inner plane 2' of wall 2, and if that wall is a cylinder head none of the piston space is occupied by any part of the valve mechanism. i

The entire device is of the simplest possible construction. The valve pro er and the combined stop and spring ho der are each cut and pressed from plate metal, no machining beiu necessary. The improved construction 'a ords maximum port with minimum cylinder clearance.

I claim 1. In a valve for blowing engines, the combination of a valve seat, a valve-seating spring, a holder for the spring, and a plate a plate valve operative between the valve, the valve havin having a struck-u ;a plurality of series of eably for inletvalve formed with struck-up portions bent over and confining the s ring.

2. In a valve for a blowmg engine, the combination of a valve seat, a valve-seatin coiled sprin a holder for the spring space from the va we sent, a plate valve operative between and unguided by either the holder or seat, the valve having struck-up portions bent over and confining an end convolution of the spring. 7

3. In a valve for blowing engines, the combination of a valve seat, a valve seating coiled spring, a holder for the sprin and older and seat with a passage formed through the a struck-up portion which is bent over an confines an end convolution of the spring.

4. The combination of a 'valve seat, a valve formed of a single piece of late metal spring-confihing portion, a s rin hol er, and a coiled spring confined y t e holder and bearing against the valve with an end. convolution of the spring secured to the valve by the struck-up portion of the latter.

5. In a blowing engine, the combination of a valve seat, a plate valve having an edge struck-up and bent to confine a spring convolution, a spring holder spaced from the valve seat and having a portion turned oppo'sitely to the stru'ck-up edge of the valve 'and a coiled spring having its oppositeend convolutions confined respectively inthe oppositely turned portions of the valve and 10( holder.

6. The combination of a valveseat having orts, a valve covering all the series, the va ve being orted intermediate the'portions thereof w ich cover the seat ports, and a valve sup orting and valve guidin coiled spring olding the valve normal y seated;

7. The combination of a valve seat havin two circular series of portsone within an spaced from the other, a valve of ring form covering both series, the valve being orted annular y intermediate the portions t ereof which cover the seat ports, and a valve supporting and valve guiding coiled spring holding the valve normall seated.

8. The combination 0 a valve seat, a valve, an abutment, and a coiled spring inte osed between the abutment and the valve an having end convolutions which, are parallel with the surfaces of the abutment and valve which the engage, said end convolutions havin 0 sets where they merge into the interm iate convolutions.

9. The combination of a valve seat, a valve, an abutment, and a coiled spring inter osed between the abutment and the valve and having end' convolutions which are parallel with each other and with the surfaces of the abutment and valve which they engage, said end convolutions having offsets where they merge into the intermediate convolutions.

10. The combination of a valve shaped to immovably confine the flat end convolution of a coiled spring, a spring holder sha ed to immovably confine the fiat end-convo ution of a coiled spring, and a coiled spring having flat end convolutions which are parallel with each other and which are immovabl'y held by the holder and valve respectively.

11. The combination of a valve seat, a valve, a spring holder, a coiled spring held in position by the holder, and a valve supported and guided wholly. by the coiled spring, said spring having flat end convolutions which are immovably secured to the holder and valve respectively.

12. The combination of a valve seat, a plate valve formed to provide lips which are bent over and confine a s ring, and a spring for the valve secure thereto by said lips.

13. The combination of a valve seat, a plate valve of ring form havin its inner and outer peripheries spaced rom fixed parts with the valve wholly supported and guided b a coiled spring, the valve formed to provi e lips which are bent over and confine a spring, and a spring for the valve secured thereto by said lips.

14. The combination of a valve seat, a plate valve cut to form lips which are bent over and confine a spring, a plate metal spring holder cut to form lips which are bent over and confine a sprin and a coiled spring interposed between t e holder and valve with lts opposite end convolutions confined by said bent lips.

15. Thecombination of a valve seat, a plate valve having struck-up portions, and a single tapered coiled valve-carr ing and valve-guidin spring supported a jacent to the va ve an secured thereto by the struckup portions of the valve.

16. The combination of a valve seat, a valve havin struck-up portions, a springholding device spaced from the seat, and a single tapered coiled valve-supportin and valve-guiding spring held by said evice and bearing on the valve and secured thereto b the struck-up portions of the valve.

17 The combination of a valve seat, a valve, a holding device spaced from the seat, a coiled spring in said space and secured to and supporting the valve, and supplemental valve cushionin springs.

18. The combination of a valve seat, a valve a coiled spring su ported concentrically with the valve andiearing thereon,

stop means for limiting the openin movement of the valve, and spring cus ioning means normally out of engagement with the valve but engaged by the atter before it engages the stop means.

19. The combination of a valve seat, a valve, a coiled spring supported concentrically with the valve and secured thereto and supporting the valve, and supplemental cushioning s rings at opposite sides of the valve for cus ioning its opening and closing movements.

20. The combination of a valve seat, a valve formed with apertures, a valve stop s aced from the seat, posts extending from t e seat to the stop through the valve apertures, and cushionin springs on the posts at oppositesides of t e valve.

21. The combination of a valve seat, a plate valve formed with a central annular opening with the edge of the metal of said opening bent to confine a spring, and a coiled spring su ported centrally of. the valve and secure to the bent edge thereof.

22. The combination of a valve seat, a plate valve formed with a central annular opening with the edge of the metal at said opening bent to confine a spring, a liner for the seating face of the valve having a bent edge complementary with and engaging the bent edge of the valve, and a coiled spring supported centrally of the valve and secured to the bent edge thereof.

23. The combination of a cylinder wall having an annular opening, a valve seat adapted to fit in reverse positions in the opening, a valve movably mounted on the seat and means for securing the valve seat in the wall 0 ening in either of its reverse" positions wit out projectin any portion of the valve mechanism beyon the inner plane of said wall.

24. The combination of a cylinder wall having an annular peripherally shouldered o ening, an annular valve seat, a valve mova ly mounted on the seat at one side thereof, the valve seat having two peripheral surfaces ada ted to bear interchangeabl on the shoul er of said wall opening, sai two surfaces and the said shoulder being so spaced and located that no part of the valve or seat project beyond the plane of the inner face of the said wall.

In testimony whereof I afiix my signature in presence of two witnesses.

LORENZ IVERSEN.

Witnesses:

. J. M. Nnsnrr,

F. E. Gamma. 

